What's this kind of graph called?

Question

I have a kind a graph, I found it while googling "tree graph" though it doesn't look like a normal tree-graph. So I was wondering, is it also just called a "tree-graph" or has it a more specific name? I want to look up more info about them, though can't really search for it without a proper name.

Thanks a lot!

PS. I'm not sure if this is the correct place to ask this, if it's not, please direct me to the proper place. Thanks.

Answer 1

Google calls it a Treemap and provides several examples and an ontology. They define the treemap as follows:

A visual representation of a data tree, where each node can have zero or more children, and one parent (except for the root, which has no parents). Each node is displayed as a rectangle, sized and colored according to values that you assign. Sizes and colors are valued relative to all other nodes in the graph. Source: Google Developers / Google Charts

Answer 2

That's a Treemap:

Treemaps display hierarchical (tree-structured) data as a set of nested rectangles. Each branch of the tree is given a rectangle, which is then tiled with smaller rectangles representing sub-branches. A leaf node's rectangle has an area proportional to a specified dimension on the data. Often the leaf nodes are colored to show a separate dimension of the data.

Answer 3

It's typically called a "heat map" or "heat chart".